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As the traceback states, the url tag in line 47 should look like this
{% url 'lfs.core.views.shop_view' %}
This has been changed in Django 1.5.
Make also sure that you are using Django 1.3.* with LFS 0.7.*. If you do this, the above error shouldn’t rise up at all.
LFS 0.9 (which is in alpha state at the moment) is using Django 1.6.*, though.
Source:stackexchange.com